CN108929933A - A kind of smelting process of low manganese Low-phosphorus Steel - Google Patents
A kind of smelting process of low manganese Low-phosphorus Steel Download PDFInfo
- Publication number
- CN108929933A CN108929933A CN201811109483.3A CN201811109483A CN108929933A CN 108929933 A CN108929933 A CN 108929933A CN 201811109483 A CN201811109483 A CN 201811109483A CN 108929933 A CN108929933 A CN 108929933A
- Authority
- CN
- China
- Prior art keywords
- steel
- manganese
- content
- phosphorus
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention provides a kind of smelting process of low manganese Low-phosphorus Steel, comprising: be fitted into electric furnace the content of the content of melting down middle manganese no more than 0.5%, phosphorus no more than 0.04% containing manganese, the lower steel scrap of phosphorus and the pig iron and steel scrap is added and iron scale that pig iron total amount is 0.5%；The substantially melting down rear sampling analysis of steel scrap, is added lime, fluorite, slag making and replacement clinker after the basicity of control clinker；When the content of manganese in melting down manganese≤0.04%, to clinker sampling analysis, lime, fluorite is added, flows slag after clinker thawing；It taps when the content of phosphorus in molten steel≤0.002%, according to lime and fluorite are added in molten steel amount；Ladle is put into refining furnace, when the temperature in refining furnace reaches 1620 DEG C, card slag is carried out and converts packet processing, so that the content of manganese is not more than 0.004% no more than the content of 0.05%, phosphorus in molten steel when tapping.The present invention can control the finished product manganese in molten steel below 0.05%, phosphorus is controlled 0.005% hereinafter, the molten steel smelted and the steel ingot of casting is made to have excellent performance.
Description
Technical field
The present invention relates to a kind of smelting process, especially a kind of smelting process of low manganese Low-phosphorus Steel.
Background technique
Mn and P is element common in steel, and Mn element can improve the yield strength and tensile strength of steel, always as beneficial
Element exists, and almost all of steel grade all contains a certain amount of manganese, and still, in orientation silicon steel, Mn element will form the second phase
Particle interferes the degree of orientation of steel grade tissue { 110 } and<001>, hinders the formation of the single goss texture of steel grade, influences the magnetism of steel
Energy；In super clean Cr-Ni-Mo-V rotor steel, Mn element can strengthen phosphorus P and act in the segregation of crystal boundary, cause grain boundaries P concentration
Increase, improve the value of FATT, amplify the embrittling effect of P, influence the performance of steel.In these steel, in order to guarantee the performance of steel,
It is required that Mn≤0.05% in steel.P element generally then is regarded as the harmful element in steel, it is desirable that the lower its content the better.
Demanganize needs stronger oxidation atmosphere, and due to features of oven profile, oxidation atmosphere is good for converter, the thermodynamics of demanganize with
Dynamic conditions is good, so traditionally low manganess steel is typically by converter producing, such as China Patent Publication No.
CN106811567A discloses a kind of production method of low manganess steel, and this method is aided with by the rifle position and basicity of control converter oxygen gun
Refining furnace stirring heating slag making, can produce the low manganess steel of terminal Mn≤0.025%, and the environment difference of electric furnace and converter is larger,
The technique of converter can not be applied on furnace operation, produce low manganese Low-phosphorus Steel for electric furnace-refining furnace, and domestic at present there has been no bright
True document or patented technology refers to.
Summary of the invention
Aiming at the shortcomings existing in the above problems, the present invention provides one kind and can control the finished product manganese in molten steel and exist
0.05% or less, phosphorus control 0.005% hereinafter, and operation it is relatively simple so that the molten steel and the steel ingot of casting smelted have
A kind of smelting process of low manganese Low-phosphorus Steel of excellent performance.
To achieve the above object, the present invention provides a kind of smelting process of low manganese Low-phosphorus Steel, comprising the following steps:
Step 1 is fitted into content the containing no more than 0.04% of the content of melting down middle manganese no more than 0.5%, phosphorus in electric furnace
The lower steel scrap of manganese, phosphorus and the pig iron and the iron scale that steel scrap and pig iron total amount are 0.5% is added；
The substantially melting down rear sampling analysis of step 2, steel scrap, is added lime, fluorite according to the content of manganese and the content of phosphorus, is controlling
Slag making and replacement clinker after the basicity of clinker processed；
Step 3, when the content of manganese in melting down manganese≤0.04%, to clinker sampling analysis, according to the content of manganese and phosphorus
Lime, fluorite is added in content, flows slag after clinker thawing；
Step 4 is tapped when the content of phosphorus in molten steel≤0.002%, according to lime and fluorite are added in molten steel amount；
Ladle is put into refining furnace by step 5, when the temperature in refining furnace reaches 1620 DEG C, is carried out card slag and is converted at packet
Reason, so that the content of manganese is not more than 0.004% no more than the content of 0.05%, phosphorus in molten steel when tapping.
The smelting process of above-mentioned a kind of low manganese Low-phosphorus Steel, wherein in step 2, according to the content of the content of manganese and phosphorus
The lime of 12~15kg/ ton steel, the fluorite of at least 3 tons steel is added, and the basicity in clinker is controlled after 1.6~1.8, progress
Slag making, and slag is flowed after 15min.
The smelting process of above-mentioned a kind of low manganese Low-phosphorus Steel, wherein when the content of manganese is greater than the content of phosphorus, addition is less than
The lime of 15kg/ tons of steel；
When the content of manganese is less than the content of phosphorus, the lime for being less than 12kg/ tons of steel is added.
The smelting process of above-mentioned a kind of low manganese Low-phosphorus Steel, wherein in step 3, according to the content of the content of manganese and phosphorus
The lime of 15-18kg/ ton steel, the fluorite of at least 4kg/ tons of steel is added, and by the basicity control in clinker 2.2~2.5, to furnace
After slag melts, and slag is flowed after 15min.
The smelting process of above-mentioned a kind of low manganese Low-phosphorus Steel, wherein when the content of manganese is less than the content of phosphorus, addition is less than
The lime of 18kg/ tons of steel；
When the content of manganese is greater than the content of phosphorus, the lime for being less than 15kg/ tons of steel is added.
The smelting process of above-mentioned a kind of low manganese Low-phosphorus Steel, wherein in step 4, the stone of molten steel amount 0.8~1% is added
0.2% fluorite of ash and molten steel amount.
The smelting process of above-mentioned a kind of low manganese Low-phosphorus Steel, wherein in step 2 to step 4, keep the temperature of molten steel not
Greater than 1600 DEG C.
The smelting process of above-mentioned a kind of low manganese Low-phosphorus Steel, wherein keep liquid steel temperature at 1570~1590 DEG C.
Compared with prior art, the invention has the following advantages that
The present invention can control the finished product manganese in molten steel below 0.05%, phosphorus is controlled 0.005% hereinafter, and operating
It is relatively simple, so that the steel ingot of the molten steel and casting smelted has excellent performance.
Specific embodiment
The present invention provides a kind of smelting process of low manganese Low-phosphorus Steel, comprising the following steps:
Step 1 is fitted into content the containing no more than 0.04% of the content of melting down middle manganese no more than 0.5%, phosphorus in electric furnace
The lower steel scrap of manganese, phosphorus and the pig iron and the iron scale that steel scrap and pig iron total amount are 0.5% is added.
The substantially melting down rear sampling analysis of step 2, steel scrap, is added lime, fluorite according to the content of manganese and the content of phosphorus, is controlling
Slag making and replacement clinker after the basicity of clinker processed.
In step 2, the lime of 12~15kg/ tons of steel, at least 3 tons of steel are added according to the content of manganese and the content of phosphorus
Fluorite, and the basicity in clinker is controlled after 1.6~1.8, slag making is carried out, and slag is flowed after 15min.
Wherein, when the content of manganese is greater than the content of phosphorus, the lime for being less than 15kg/ tons of steel is added；
When the content of manganese is less than the content of phosphorus, the lime for being less than 12kg/ tons of steel is added.
Step 3, when the content of manganese in melting down manganese≤0.04%, to clinker sampling analysis, according to the content of manganese and phosphorus
Lime, fluorite is added in content, flows slag after clinker thawing.
In step 3, lime, at least 4kg/ tons of steel of 15-18kg/ tons of steel are added according to the content of manganese and the content of phosphorus
Fluorite, and the basicity control in clinker after clinker thawing, and is flowed into slag 2.2~2.5 after 15min.
Wherein, when the content of manganese is less than the content of phosphorus, the lime for being less than 18kg/ tons of steel is added；
When the content of manganese is greater than the content of phosphorus, the lime for being less than 15kg/ tons of steel is added.
Step 4 is tapped when the content of phosphorus in molten steel≤0.002%, according to lime and fluorite are added in molten steel amount.
Wherein, when lime is with fluorite in molten steel, the additional amount of lime is the 0.8~1% of molten steel amount, the additional amount of fluorite
It is the 0.2% of molten steel amount.
In addition, keeping the temperature of molten steel no more than 1600 DEG C in step 2 to step 4.
Wherein, keep liquid steel temperature at 1570~1590 DEG C.
Ladle is put into refining furnace by step 5, when the temperature in refining furnace reaches 1620 DEG C, is carried out card slag and is converted at packet
Reason, so that the content of manganese is not more than 0.004% no more than the content of 0.05%, phosphorus in molten steel when tapping.
Embodiment:
(1) 100t EBT charging 105t is incorporated 530kg iron scale with material, and supplying manganese is 0.48%, phosphorus 0.037%；
(2) steel scrap is substantially melting down, measures 1573 DEG C of liquid steel temperature, sampling analysis, manganese in molten steel: 0.289%, phosphorus:
0.018%, lime 1300kg, fluorite 300kg is added, basicity of slag 1.7 carries out slag making, changes slag after 15min；
(3) sampling analysis manganese: 0.088%, phosphorus 0.012%, be added lime 1300kg, fluorite 300kg, basicity of slag 1.7,
Carry out slag making；
(4) it after the completion of (3) step, is sampled after flowing slag, at this time manganese: 0.038%, phosphorus 0.011% measures liquid steel temperature
1576 DEG C, demanganize has been completed at this time, subsequent carry out dephosphorization, addition 1500kg lime, 400kg fluorite, and stream slag takes after 15min
Sample；
(5) manganese is sampled to obtain: 0.036%, phosphorus: 0.003%, 1582 DEG C of liquid steel temperature, (4) operation is repeated, slag making stream is carried out
Slag；
(6) continue to sample, manganese in molten steel: 0.033%, phosphorus 0.002% meets the requirements, and meets to remaining ingredient and temperature
900kg lime and 200kg fluorite is added in related process, tapping；
(7) enter refining furnace, sample to obtain manganese in molten steel: 0.029%, phosphorus 0.002%, heating after a certain period of time, molten steel temperature
1626 DEG C of degree, carries out card slag and converts packet, converts after wrapping manganese in molten steel: 0.027%, phosphorus: 0.002%；
(8) subsequent progress refining furnace routine operation, manganese in molten steel when tapping: 0.038%, phosphorus: 0.003%.
Through examining, manganese, phosphorus composition in molten steel meet the requirements.
The foregoing is merely presently preferred embodiments of the present invention, is merely illustrative and not restrictive for the invention.
Those skilled in the art understand that many changes can be carried out in the spirit and scope defined by invention claim to it, modify,
It is even equivalent, but fall in protection scope of the present invention.
Claims (8)
1. a kind of smelting process of low manganese Low-phosphorus Steel, comprising the following steps:
Step 1, the content that melting down middle manganese is fitted into electric furnace contain manganese, phosphorus no more than 0.04% no more than the content of 0.5%, phosphorus
Lower steel scrap and the pig iron and the iron scale that steel scrap and pig iron total amount are 0.5% is added；
The substantially melting down rear sampling analysis of step 2, steel scrap, is added lime, fluorite according to the content of manganese and the content of phosphorus, in control furnace
Slag making and replacement clinker after the basicity of slag；
Step 3, when the content of manganese in melting down manganese≤0.04%, to clinker sampling analysis, according to the content of the content of manganese and phosphorus
Lime, fluorite is added, flows slag after clinker thawing；
Step 4 is tapped when the content of phosphorus in molten steel≤0.002%, according to lime and fluorite are added in molten steel amount；
Ladle is put into refining furnace by step 5, when the temperature in refining furnace reaches 1620 DEG C, is carried out card slag and is converted packet processing, make
The content of manganese is not more than 0.004% no more than the content of 0.05%, phosphorus in molten steel when must tap.
2. a kind of smelting process of low manganese Low-phosphorus Steel according to claim 1, which is characterized in that in step 2, according to manganese
Content and the content of phosphorus be added the fluorite of the lime of 12~15kg/ ton steel, at least 3 tons steel, and by the basicity control in clinker
After 1.6~1.8, slag making is carried out, and slag is flowed after 15min.
3. a kind of smelting process of low manganese Low-phosphorus Steel according to claim 2, which is characterized in that when the content of manganese is greater than phosphorus
Content when, be added be less than 15kg/ tons of steel lime；
When the content of manganese is less than the content of phosphorus, the lime for being less than 12kg/ tons of steel is added.
4. a kind of smelting process of low manganese Low-phosphorus Steel according to claim 1, which is characterized in that in step 3, according to manganese
Content and the content of phosphorus be added the fluorite of the lime of 15-18kg/ tons of steel, at least 4kg/ tons of steel, and by the basicity control in clinker
System after clinker thawing, and flows slag 2.2~2.5 after 15min.
5. a kind of smelting process of low manganese Low-phosphorus Steel according to claim 4, which is characterized in that when the content of manganese is less than phosphorus
Content when, be added be less than 18kg/ tons of steel lime；
When the content of manganese is greater than the content of phosphorus, the lime for being less than 15kg/ tons of steel is added.
6. a kind of smelting process of low manganese Low-phosphorus Steel according to claim 4, which is characterized in that in step 4, steel is added
0.2% fluorite of lime and molten steel amount of water 0.8~1%.
7. according to claim 1 to a kind of smelting process of any low manganese Low-phosphorus Steel in 6, which is characterized in that in step 2
To in step 4, keep the temperature of molten steel no more than 1600 DEG C.
8. a kind of smelting process of low manganese Low-phosphorus Steel according to claim 7, which is characterized in that liquid steel temperature is kept to exist
1570~1590 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109483.3A CN108929933B (en) | 2018-09-21 | 2018-09-21 | Smelting method of low-manganese and low-phosphorus steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109483.3A CN108929933B (en) | 2018-09-21 | 2018-09-21 | Smelting method of low-manganese and low-phosphorus steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108929933A true CN108929933A (en) | 2018-12-04 |
| CN108929933B CN108929933B (en) | 2020-11-27 |
Family
ID=64443656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811109483.3A Active CN108929933B (en) | 2018-09-21 | 2018-09-21 | Smelting method of low-manganese and low-phosphorus steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108929933B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277215A (en) * | 2021-11-26 | 2022-04-05 | 重庆大学 | Method for smelting low-manganese steel by using high-manganese scrap steel in medium-frequency induction furnace |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03111511A (en) * | 1989-09-23 | 1991-05-13 | Sumitomo Metal Ind Ltd | Method for producing low manganese steel |
| CN101519711A (en) * | 2008-02-26 | 2009-09-02 | 宝山钢铁股份有限公司 | Method for desiliconizing, demanganizing, dephosphorizing and desulfurating molten iron |
| CN102534088A (en) * | 2012-01-30 | 2012-07-04 | 邢台钢铁有限责任公司 | Process for demanganizing molten iron by utilizing dephosphorizing station |
| CN103233092A (en) * | 2013-04-25 | 2013-08-07 | 浙江大江合金钢钢管有限公司 | Process for smelting steel special for corrosion-resistant heat exchanger |
| CN106811567A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | A kind of method for producing low manganess steel |
| CN107868900A (en) * | 2017-11-20 | 2018-04-03 | 南阳汉冶特钢有限公司 | A kind of ultralow phosphorus faces the production method of hydrogen steel |
-
2018
- 2018-09-21 CN CN201811109483.3A patent/CN108929933B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03111511A (en) * | 1989-09-23 | 1991-05-13 | Sumitomo Metal Ind Ltd | Method for producing low manganese steel |
| CN101519711A (en) * | 2008-02-26 | 2009-09-02 | 宝山钢铁股份有限公司 | Method for desiliconizing, demanganizing, dephosphorizing and desulfurating molten iron |
| CN102534088A (en) * | 2012-01-30 | 2012-07-04 | 邢台钢铁有限责任公司 | Process for demanganizing molten iron by utilizing dephosphorizing station |
| CN103233092A (en) * | 2013-04-25 | 2013-08-07 | 浙江大江合金钢钢管有限公司 | Process for smelting steel special for corrosion-resistant heat exchanger |
| CN106811567A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | A kind of method for producing low manganess steel |
| CN107868900A (en) * | 2017-11-20 | 2018-04-03 | 南阳汉冶特钢有限公司 | A kind of ultralow phosphorus faces the production method of hydrogen steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277215A (en) * | 2021-11-26 | 2022-04-05 | 重庆大学 | Method for smelting low-manganese steel by using high-manganese scrap steel in medium-frequency induction furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108929933B (en) | 2020-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103898269B (en) | The quick smelting process of a kind of ultralow-sulfur steel | |
| CN102758144B (en) | Production method for steel ingot of large-sized high-nitrogen retaining ring steel | |
| CN102952923B (en) | Process for smelting aluminum containing steel through calcium carbide deoxidation | |
| CN105039648B (en) | Method for smelting low-carbon and high-manganese-content molten steel through argon oxygen decarburizing furnace | |
| CN102162019B (en) | Multistage combined pretreatment method for vanadium-bearing molten iron | |
| CN107287502A (en) | A kind of nitrogenous steel smelting process | |
| CN104451385B (en) | A kind of low-carbon (LC), low nitrogen, hyperoxia ingot iron and its production method | |
| CN107299194A (en) | The method for making steel of dephosphorization after a kind of stove | |
| CN107893188B (en) | A kind of smelting process of high intensity manganese-boron steel | |
| CN105420445B (en) | A kind of method for smelting coarse-grained steel | |
| CN103642970A (en) | Smelting method of low-carbon aluminum killed steel | |
| CN104611502A (en) | Aluminum-containing and sulfur-containing series gear steel smelting process | |
| CN105950826B (en) | A kind of ladle refining furnace refining slag deoxidier and its application method | |
| CN104141025A (en) | Method for casting and dealuminizing ferrovanadium by electro-aluminothermic process | |
| CN101220413A (en) | Technique for smelting ferroferrite with sponge iron | |
| CN107365949A (en) | A kind of method of smelting ultralow-carbon high-alloy stainless steel | |
| CN105132611B (en) | Method for producing ultra-low phosphorous steel through single slag of converter | |
| CN106929633B (en) | A kind of smelting process of ultra-low-carbon steel | |
| CN108330240A (en) | Method of the aluminium without calcification processing drops in continuous casting Q235 steel grades | |
| CN105463149A (en) | Process for deoxidation smelting of aluminum-bearing steel by means of silicon carbide | |
| CN104263873A (en) | Process for producing aluminum-containing medium carbon steel through CaC2 deoxidization | |
| CN107034421A (en) | Highly corrosion resistant high tensile reinforcement and its converter manufacture method | |
| CN107058679A (en) | A kind of method for stablizing half steel quality | |
| CN103205522B (en) | Method for smelting plain carbon steel from semi-steel | |
| CN106319153B (en) | A kind of AOD smelting processes of stainless steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |